axf_mii_read
val = axf_mii_read(dp, MII_AN_ADVERT, &err);
val = axf_mii_read(dp, MII_AN_ADVERT, &err);
ugcp->usbgc_mii_read = &axf_mii_read;
static uint16_t axf_mii_read(struct usbgem_dev *, uint_t, int *errp);